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Two new diarylheptanoids from the pericarps of Juglans regia L.

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Chinese Chemical Letters 2007年第8期18卷 943-946页

作者： jun xi liu Duo Long Di xin Yi Huang Chen Li Key Laboratory for Natural Medicine of Gansu Province Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

Two new cyclic diarylheptanoids juglanin A （1） and juglanin B （2） were isolated from the pericarps of Juglans regia L. Their structures were elucidated by various spectroscopic methods including 2D NMR techniques ... 详细信息

关键词： Juglans regia L. Pericarps Diarylheptanoids Juglanin A Juglanin B

Two New Eremophilane Sesquiterpene Lactones from Ligularia myriocephala Ling

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Chinese Chemical Letters 2005年第12期16卷 1618-1620页

作者： jun xi liu xiao Ning WEI Yan Ping SHI Run Hua LU Key Laboratory for Natural Medicine of Gansu Province Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 Chengdu Institute of Biology Chinese Academy of Sciences Chengdu 610041

Two new eremophilane sesquiterpene lactones, 1β-angeloyloxy-6β, 10β-dihydroxy-8β- methoxyeremophila-7（ll）en-8α,12-olide and 1β-angeloyloxy-6β,10α-dihydroxy-8α-methoxyeremo- phila-7（ 11）en-8β, 12-olide were isolated from the extract of the whole plant of Ligularia myriocephala Ling. Their structures and stereochemistry were elucidated by various spectroscopic methods including intensive 2D-NMR techniques （COSY, gHMQC, gHMBC and ^1H-^1H NOESY） and HR-ESIMS.

关键词： Ligularia myriocephala Ling Compositae sesquiterpene lactones eremophilanolide

A New Flavonoid from Oxytropis kansuensis

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Chinese Chemical Letters 2006年第12期17卷 1576-1578页

作者： jun xi liu xin Yi HUANG Duo Long DI Sheng xiang JIANG Key Laboratory for Natural Medicine of Gansu Province Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000

A new flavonoid 1 rhamnocitrin-3-O-（6＂-femloyl）-β-D-galactopyranoside-4＇-O-β-D- glucospyranoside called kansuensisoside A together with a known flavonoid 2 （rhamnocitrin- 3-O-β-D-galactopyranoside-4＇-O-β-D-glucospyranoside） were isolated from the extract of the whole plant of Oxytropis kansuensis Bunge. The structure of 1 was elucidated by spectroscopic methods including 2D-NMR techniques （COSY, HMQC, HMBC） and HR-ESIMS.

关键词： Oxytropis kansuensis Bunge leguminosae flavonoid kansuensisoside A

Synergistic effect between Er-doped MoS_(2)nanosheets and interfacial Mo-N coupling phases for enhanced electrocatalytic hydrogen evolution

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Rare Metals 2024年第3期43卷 1301-1308页

作者： Nian-Peng Li Lei Zhang Hua Zhang Fan-Fei Min Lei Wang Sam Toan xi-jun liu Guang-Zhi Hu State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines School of Materials Science and EngineeringAnhui University of Science and TechnologyHuainan232001China Donghai Laboratory Zhoushan316021China Department of Chemical Engineering University of Minnesota-DuluthDuluthMN55812USA School of Ecology and Environmental Science Institute for Ecological Research and Pollution Control of Plateau LakesYunnan UniversityKunming650504China MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured MaterialsGuangxi UniversityNanning530004China

Hydrogen production via electrochemical water splitting is a promising and green *** one of the most representative transition metal sulfides layered materials,Molybdenum disulfide(MoS_(2))has immense potential for the hydrogen evolution reaction(HER).We successfully prepared a nitrogen-doped carbon(NC)in situ-grown erbium-doped MoS_(2)polyhedral structure(Er-MoS_(2)/NC)that incorporates an interfacial Mo-N coupling phase.

关键词： hydrogen interfacial coupling

Overexpression of nuclear β-catenin in rectal adenocarcinoma is associated with radioresistance

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World Journal of Gastroenterology 2013年第40期19卷 6876-6882页

作者： Lin Wang xiao-Mei Zhang Zhen Li xi-jun liu Jie Chai Guang-Yong Zhang Yu-Feng Cheng Department of Radiation Oncology Qilu HospitalShandong University Department of Radiation Oncology Shandong Tumor Hospital and Institute Department of General Surgery Shandong Tumor Hospital and Institute Department of General Surgery Qilu HospitalShandong University

AIM:To investigate the association between nuclearβ-catenin overexpression in rectal adenocarcinoma and ***:A retrospective analysis was *** analysis involved 136 patients with locally advanced rectal adenocarcinoma who underwent shortcourse preoperative radiotherapy and radical *** expression ofβ-catenin in both pretreatment biopsy specimens and resected primary tumor tissues was examined by *** correlation ofβ-catenin expression with radioresistance was evaluated using the tumor regression grading(TRG)*** relationship betweenβ-catenin expression and clinicopathological characteristics was also *** and logistic multivariate regression analyses were adopted to determine the independent factors of ***:Nuclearβ-catenin overexpression was more evident in radioresistant rectal adenocarcinoma than in radiosensitive rectal adenocarcinoma(57.6%vs 16.7%,P<0.001).Nuclearβ-catenin was overexpressed in favor of poor TRG(≤2),whereas membraneβ-catenin was expressed in favor of good TRG(≥3).Nuclearβ-catenin expression in tumor cell differentiation(P=0.018),lymph node metastasis(P=0.022),and TRG(P<0.001)showed significant *** analyses demonstrated that radioresistance is associated with nuclearβ-catenin overexpression(P<0.001).In addition,logistic multivariate regression analysis indicated that only three factors,namely,tumor size(P<0.001),tumor cell differentiation(P<0.001),and nuclearβ-catenin overexpression(P<0.001),are associated with *** using radioresistance as a prediction target,nuclearβ-catenin-based prediction alone achieved 83%accuracy,65%sensitivity,and88%***:Nuclearβ-catenin overexpression may be a valuable candidate to predict the response of rectal adenocarcinoma to preoperative radiotherapy.

关键词： β-catenin Rectal cancer Preoperative radiotherapy Radioresistance Colorectal cancer

Rapid Identification of Mycobacterium Leprae by Polymerase Chain Reaction-restriction Fragment Length Polymorphism Analysis of the Heat Shock Protein 65 Gene from Skin Specimens

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Chinese Medical Journal 2015年第21期128卷 2964-2966页

作者： Zheng Zhao xi-Wan liu jun Jia Lin Cai Jian-Zhong Zhang Department of Dermatology Peking University Peopte's Hospital Beijing 100044 China

INTRODUCTIONLeprosy caused by Mvcobacterium leprae （M. leprae）, is a chronic granulomatous disease affecting the skin and peripheral nervous system, which is transmitted through direct contact with nontreated or inadequate treatment patients. Diagnosis of leprosy depends on the clinical signs and symptoms and slit skin smear positivity. However, it＇s sometimes similar with other granulomatous disease caused by mycobacterial infection. Early stage leprosy is difficult to diagnose by clinical criterion alone because the sensitivity of acid-fast bacilli staining is quite low. The polymerase chain reaction-restriction fragment length polymorphism （PCR-RFLP） shows the great advantage in rapid identification and diagnosis for early cases and has a differentiation between leprosy and nonleprosy cases.

关键词： Heat Shock Protein 65 Gene Mycobacterium Leprae Polymerase Chain Reaction-restriction Fragment LengthPolymorphism

Research on Multi-parameter-based Spoofing Detection Method for Satellite-based Train Positioning

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Research on Multi-parameter-based Spoofing Detection Method ...

Isocorydine derivatives and their anticancer activities

第十三届中国卫星导航年会

作者： jun-xi liu Jiang liu Bai-gen Cai Jian Wang School of Electronic and Information Engineering Beijing Jiaotong University Frontiers Science Center for Smart High-speed Railway System Beijing Jiaotong University School of Computer Science and Technology Beijing Jiaotong University

Train positioning technology based on Global Navigation Satellite System（GNSS） is an important content of the next-generation railway train control systems. Under the complex train operation environment, spoofing to the navigation satellite signals can affect the accuracy and credibility of the train positioning result and may even lead to accidents. Based on the principle of spoofing, this paper designs multiple sets of experiments and analyzes the degradation mechanism of characteristic indices of navigation satellite signals under spoofing conditions. Base on that, the characteristic consistency detection and identification scheme to GNSS spoofing is proposed by multi-dimensional parameters within both the observation domain and position domain. Using a navigation satellite signal simulator and the filed data, a typical GNSS spoofing test scenario dedicated to the train operation process is generated, and the spoofing detection method proposed in this paper is validated. The results illustrate that this method can integrate multiple parameters to realize effective spoofing detection and identification, which enables the effective spoofing protection capability for GNSS-based train positioning.

关键词： train positioning Global Navigation Satellite System spoofing detection multi-parameter detection test scenario

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Isocorydine derivatives and their anticancer activities

Synthesis of n-Butyl Acetate by Microwave Irradiation Under the Assistance of Solid-Liquid Phase Transfer Catalysis Without Solvent

中国化学会第十届全国天然有机化学学术会议

作者： Mei Zhong Yan-Juan liu jun-xi liu Duo-Long Di Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province Lanzhou Institute of Chemical Physics Chinese Academy of Sciences

＜正＞In order to improve the anticancer activity of isocorydine,ten isocorydine derivatives were prepared through chemical structure modifications,and their in vitro and in vivo activities were experimentally investigated.8-Amino-isocorydine（8）and 6a,7-dihydrogen-isocorydione（10）could inhibit the growth of human lung（A549）,gastric（SGC7901）,and liver（HepG2）cancer cell lines in

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Chemical Research in Chinese Universities 1992年第3期8卷 324-326页

作者： XU Wen-guo, liu Fu-an, YU Ai-min, LI Yao-xian, JIN Shen-xi,liu jun and JIN Qin-han (Department of Chemistry, Jilin University, Changchun, 130023)

Introduction Microwave irradiation has been very widely used in heating, cooking and brewing. Several papers which describe the use of domestic microwave ovens to perform rapid organic synthesis in solution have been published. The high heating efficiency gives rise to remarkable rate of reaction and dramatic reduction of reaction time. Nevertheless, its application seems to be limited to these procedures because of

关键词： Microwave irradiation Phase transfer catalysis Synthesis n-Butyl ace-tate Inorganic support